Computer Science – Information Theory
Scientific paper
2005-09-28
IEEE Transactions on Communications Vol. 53 (9), Sep. 2005, pp. 1561-1570
Computer Science
Information Theory
10 pages (twocolumn), 5 figures
Scientific paper
10.1109/TCOMM.2005.855010
Phase noise and frequency offsets are due to their time-variant behavior one of the most limiting disturbances in practical OFDM designs and therefore intensively studied by many authors. In this paper we present a generalized framework for the prediction of uncoded system performance in the presence of time-variant distortions including the transmitter and receiver pulse shapes as well as the channel. Therefore, unlike existing studies, our approach can be employed for more general multicarrier schemes. To show the usefulness of our approach, we apply the results to OFDM in the context of frequency offset and Wiener phase noise, yielding improved bounds on the uncoded performance. In particular, we obtain exact formulas for the averaged performance in AWGN and time-invariant multipath channels.
Jung Peter
Wunder Gerhard
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